From 5d766d8e2312749ded0518464c2911bada4bac25 Mon Sep 17 00:00:00 2001 From: Clifton Reddy Date: Tue, 22 Apr 2025 14:21:12 -0500 Subject: [PATCH] updated formula variables to distinguish TiR from ToR Signed-off-by: Clifton Reddy --- case-studies/eshoppen.md | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) diff --git a/case-studies/eshoppen.md b/case-studies/eshoppen.md index fa9ba28..063cf03 100644 --- a/case-studies/eshoppen.md +++ b/case-studies/eshoppen.md @@ -90,23 +90,23 @@ P[kwH] = (Power consumed by CPU or Pc Number of cores + Power consumed by Memory ### Embodied Carbon (`M`) -The equation to calculate `M = TE * (TR/EL) * (RR/TR)` +The equation to calculate `M = TE * (TiR/EL) * (RR/ToR)` Where: * TE = Total Embodied Emissions, the sum of LCA emissions for all hardware components associated with the application server. -* TR = Time Reserved, the length of time the hardware is reserved for use by the software. +* TiR = Time Reserved, the length of time the hardware is reserved for use by the software. * EL = Expected Lifespan, the anticipated time that the equipment will be installed. * RR = Resources Reserved, the number of resources reserved for use by the software. -* TR = Total Resources, the total number of resources available. +* ToR = Total Resources, the total number of resources available. For this component: * TE: We will source the embodied carbon estimates for the servers from the [Cloud Carbon Footprint Coefficient](https://github.com/cloud-carbon-footprint/cloud-carbon-coefficients/blob/main/output/coefficients-azure-embodied.csv) Data Set. -* TR: 1 hr. +* TiR: 1 hr. * EL: We will assume a 4 year lifespan or 35,040 hrs. * RR: A virtual machine with 2 vCPUs was used, this data was sourced from [Cloud Carbon Footprint Azure Instances Coefficients](https://github.com/cloud-carbon-footprint/cloud-carbon-coefficients/blob/main/data/azure-instances.csv). -* TR: The bare metal host is split up into 16 vCPUs in total. This data was sourced from the [Cloud Carbon Footprint Azure Instances Coefficients](https://github.com/cloud-carbon-footprint/cloud-carbon-coefficients/blob/main/data/azure-instances.csv). +* ToR: The bare metal host is split up into 16 vCPUs in total. This data was sourced from the [Cloud Carbon Footprint Azure Instances Coefficients](https://github.com/cloud-carbon-footprint/cloud-carbon-coefficients/blob/main/data/azure-instances.csv). ### Database server for Web application @@ -135,23 +135,23 @@ P[kwH] = (Power consumed by CPU or Pc Number of cores + Power consumed by Memory ### Embodied Carbon (`M`) -The equation to calculate `M = TE * (TR/EL) * (RR/TR)` +The equation to calculate `M = TE * (TiR/EL) * (RR/ToR)` Where: * TE = Total Embodied Emissions, the sum of LCA emissions for all hardware components associated with the database server. -* TR = Time Reserved, the length of time the hardware is reserved for use by the software. +* TiR = Time Reserved, the length of time the hardware is reserved for use by the software. * EL = Expected Lifespan, the anticipated time that the equipment will be installed. * RR = Resources Reserved, the number of resources reserved for use by the software. -* TR = Total Resources, the total number of resources available. +* ToR = Total Resources, the total number of resources available. For this component: * TE: We will source the embodied carbon estimates for the servers from the [Cloud Carbon Footprint Coefficient](https://github.com/cloud-carbon-footprint/cloud-carbon-coefficients/blob/main/output/coefficients-azure-embodied.csv) Data Set. -* TR: 1 hr. +* TiR: 1 hr. * EL: We will assume a 4 year lifespan or 35,040 hrs. * RR: A virtual machine with 2 vCPUs was used, this data was sourced from [Cloud Carbon Footprint Azure Instances Coefficients](https://github.com/cloud-carbon-footprint/cloud-carbon-coefficients/blob/main/data/azure-instances.csv). -* TR: The bare metal host is split up into 16 vCPUs in total. This data was sourced from the [Cloud Carbon Footprint Azure Instances Coefficients](https://github.com/cloud-carbon-footprint/cloud-carbon-coefficients/blob/main/data/azure-instances.csv). +* ToR: The bare metal host is split up into 16 vCPUs in total. This data was sourced from the [Cloud Carbon Footprint Azure Instances Coefficients](https://github.com/cloud-carbon-footprint/cloud-carbon-coefficients/blob/main/data/azure-instances.csv). ## (Quantify) SCI Value Calculation @@ -185,13 +185,13 @@ I = **951 gCO2e/kWh** ### Embodied Carbon (`M`) -`M = TE * (TR/EL) * (RR/TR)` +`M = TE * (TiR/EL) * (RR/ToR)` - TE = 1205.52 kgCo2e -- TR = 1 hour +- TiR = 1 hour - EL = 35040 - RR = 2 -- TR = 16 +- ToR = 16 M = 1205.52 * (1/35040) * (2/16) = 0.004305 KG =~ **4.305 gCO2e** @@ -227,13 +227,13 @@ I = **951 gCO2e/kWh** ### Embodied Carbon (`M`) -`M = TE * (TR/EL) * (RR/TR)` +`M = TE * (TiR/EL) * (RR/ToR)` - TE = 1433.12 kgCo2e -- TR = 1 hour +- TiR = 1 hour - EL = 35040 - RR = 2 -- TR = 16 +- ToR = 16 M = 1433.12 * (1/35040) * (2/16) = 0.005112 KG =~ **5.112 gCO2e**